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  <div id="layout-content"><div id="function.unlink" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">unlink</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">unlink</span> &mdash; <span class="dc-title">删除文件</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.unlink-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>unlink</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>, <span class="methodparam"><span class="type">?</span><span class="type"><span class="type">resource</span><span class="type"></span></span> <code class="parameter">$context</code><span class="initializer"> = <strong><code>null</code></strong></span></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   删除 <code class="parameter">filename</code>。和 Unix C 的
   unlink() 函数相似。
   发生错误时会产生一个 <strong><code>E_WARNING</code></strong> 级别的错误。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.unlink-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">filename</code></dt>

     <dd>

      <p class="para">
       文件的路径。
      </p>
      <p class="para">
       如果文件是符号链接，将会删除符号链接。在 Windows 上，删除目录的符号链接，必须使用 <span class="function"><a href="function.rmdir.html" class="function">rmdir()</a></span>。
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">context</code></dt>

     <dd>

      <p class="para"><a href="stream.contexts.html" class="link">上下文流（context stream）</a>
<span class="type">resource</span>。</p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.unlink-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.unlink-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>7.3.0</td>
      <td>
       现在 Windows 也可以用 <span class="function"><strong>unlink()</strong></span> 删除文件句柄还在使用中的文件了，在此之前是无法删除的。
       然而，还是无法重新创建文件，需要等到所有句柄都关闭才可以。
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 examples" id="refsect1-function.unlink-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2234">
    <p><strong>示例 #1 基本的 <span class="function"><strong>unlink()</strong></span> 用法</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fh&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">'test.html'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'a'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fh</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'&lt;h1&gt;Hello&nbsp;world!&lt;/h1&gt;'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fh</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #DD0000">'test.html'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.unlink-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.rmdir.html" class="function" rel="rdfs-seeAlso">rmdir()</a> - 删除目录</span></li>
   </ul>
  </p>
 </div>

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